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authorPaolo Bonzini <pbonzini@redhat.com>2013-02-22 17:36:25 +0100
committerJuan Quintela <quintela@redhat.com>2013-03-11 13:32:01 +0100
commit52e850dea988585c3d693fd9cd4a4c38968d89b8 (patch)
treee5fe8eb730492bdb8ca258f2be35f3e8a5dfad8b /include
parent323920c4eac01de74cf2b5e941c97ca9b2d36b7f (diff)
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block-migration: add lock
Some state is shared between the block migration code and its AIO callbacks. Once block migration will run outside the iothread, the block migration code and the AIO callbacks will be able to run concurrently. Protect the critical sections with a separate lock. Do the same for completed_sectors, which can be used from the monitor. Reviewed-by: Orit Wasserman <owasserm@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/qemu/atomic.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/qemu/atomic.h b/include/qemu/atomic.h
index 96a194b..10becb6 100644
--- a/include/qemu/atomic.h
+++ b/include/qemu/atomic.h
@@ -16,6 +16,7 @@
*/
#define smp_wmb() barrier()
#define smp_rmb() barrier()
+
/*
* We use GCC builtin if it's available, as that can use
* mfence on 32 bit as well, e.g. if built with -march=pentium-m.